Submission #121195

#	Time	Username	Problem	Language	Result	Execution time	Memory
121195		claudy	Sure Bet (CEOI17_sure)	C++14	0 / 100	2 ms	384 KiB

sure

//# pragma GCC optimize("Ofast,no-stack-protector")
//# pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
# pragma GCC optimize("Ofast")
# pragma GCC optimization ("unroll-loops")
# include "bits/stdc++.h"
std::pair<int,int> DR[] = {{-1,0},{0,1},{1,0},{0,-1},{-1,1},{-1,-1},{1,1},{1,-1}};
# define ll long long
# define clock (clock() * 1000.0 / CLOCKS_PER_SEC)
# define rc(s) return cout << s,0
# define rcg(s) cout << s;exit(0)
# define _ ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
# define db(x) cerr << #x << " = " << x << '\n'
# define pb push_back
# define mp make_pair
# define all(s) s.begin(),s.end()
# define sz(x) (int)((x).size())
//# define int ll
using namespace std;

// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# define LOCAL
# define sim template < class c
# define ris return * this
# define dor > debug & operator <<
# define eni(x) sim > typename \
enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifdef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
*this << "[";
for (auto it = d.b; it != d.e; ++it)
*this << ", " + 2 * (it == d.b) << *it;
ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define show(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
int gcd(int a, int b)
{
if(b) return gcd(b,a%b);
return a;
}mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

int n;
vector<long double>veca,vecb;
long double a[1 << 17],b[1 << 17];
vector<long double>vals;

int32_t main(){_
	//freopen("input","r",stdin);
	cin >> n;
	for(int i = 1;i <= n;i++)
	{
		long double x,y;
		cin >> x >> y;
		veca.pb(x);
		vecb.pb(y);
	}
	sort(veca.rbegin(), veca.rend());
	sort(vecb.rbegin(), vecb.rend());
	for(int i = 0;i < n;i++)
	{
		a[i + 1] = veca[i];
		b[i + 1] = vecb[i];
		a[i + 1] += a[i];
		b[i + 1] += b[i];
		vals.pb(a[i + 1]);
		vals.pb(b[i + 1]);
	}
	long double ans = 0;
	sort(vals.begin(),vals.end());
	for(int cnt = 1;cnt <= 2 * n;cnt++)
	{
		int l = 0;
		int r = sz(vals) - 1;
		while(l < r)
		{
			int mid = l + r + 1 >> 1;
			bool B = 1;
			int x = lower_bound(a + 1,a + 1 + n,vals[mid]) - a;
			if(x > n) B = 0;
			x += lower_bound(b + 1,b + 1 + n,vals[mid]) - b;
			if(lower_bound(b + 1,b + 1 + n,vals[mid]) - b > n) B = 0;
			if(x <= cnt && B) l = mid;
			else r = mid - 1;
		}
		ans = max(ans,vals[l] - cnt);
	}
	cout << fixed << setprecision(4) << ans << endl;
	return 0;
}

Compilation message (stderr)

sure.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 # pragma GCC optimization ("unroll-loops")
 
sure.cpp: In function 'int32_t main()':
sure.cpp:91:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int mid = l + r + 1 >> 1;
              ~~~~~~^~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 40